Interstate 17 (I-17) is a major north-south U.S. Highway that runs for approximately 236 miles (380 kilometers) through the states of Arizona and Nevada. It starts at the Phoenix metropolitan area in southwestern Arizona, traveling northward via Prescott, Flagstaff, and the Mogollon Rim Country before crossing the state border into northern Arizona and ending at the Utah state line near Fredonia. The highway serves as a crucial transportation artery between several major cities in Arizona, connecting them with economic hubs, recreational areas, and military installations. I-17 is part of the National Highway System, signifying its strategic importance for interstate travel and commerce within the United States.